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- environment cleaning grade 环境净化级别
- Please keep our environment clean and tidy! 请保持我们的环境干净整洁！
- Clean up scraps; keep the machine and environment clean. 清除切屑、擦拭机床，使机床与环境保持清洁状态。
- Keep environment clean and maintain good air ventilation. 保持环境清洁及空气流通。
- Don't be a litterbug / litter lout. Help keep the city / environment clean. 不准宠物随地大小便;宠物粪便必须随时清除.
- Ten newly born SD rats of clean grade were selected to isolate the brain tissue under sterile condition and clone brain-derived NSCs. 实验选取清洁级SD新生鼠10只,无菌条件下分离脑组织,克隆传代培养脑源性神经干细胞。
- Kunming mice of clean grade were purchased from Animal Experiment Center, Nanjing University of Traditional Chinese Medicine (number of animal license SYXK 2005-0009). 清洁级昆明种小鼠购自南京中医药大学实验动物中心(动物生产许可证号为SYXK(苏)2005-0009)。
- MATERIALS: Twenty-four New Zealand rabbits of clean grade were used in this study.Perfluorodecalin liquids were offered by Shanghai Huajieshi Medical Device Co., Ltd. 材料：清洁级新西兰白兔24只，全氟萘烷由上海华捷视医疗设备有限公司提供。
- SARS taught people a good lesson, so it's everyone's duty to keep our environment clean. SARS给了人们一个很好的教训,所以保持环境整洁是每个人的责任。
- It will be easier to keep the environment clean if we don't throw away so much rubbish. 如果我们不扔掉太多垃圾的话,保持环境清洁就比较容易办到了。
- Community groups have been invited to organise activities to promote public awareness in keeping the environment clean. 本署邀请各社区团体举办活动,鼓励市民保持环境清洁。
- Click on the smokestack to the left to find out more about pollution and how you can help make the environment clean and safe. 该网站提供很多与污染相关的信息，同时还有如何治理和预防污染的知识。
- Encourage your family, friends, neighbors and colleagues to keep our environment clean. 鼓励你的家人、朋友、邻居和同事保持环境清洁。
- It is our duty to keep our environment clean and tidy. You might ask yourself, "Have I ever picked up some rubbish and thrown it into a dustbin? 保持环境整洁是我们大家的责任。你可以问自己：“我是否曾捡起一些垃圾并把它们扔到垃圾箱里?
- They even sought to keep the environs clean and the drains unpolluted. 他们还能保持环境清洁，而不污染水道。
- It is our duty to keep our environment clean and tidy. You might ask yourself, “Have I ever picked up some rubbish and thrown it into a dustbin? 保持环境整洁是我们大家的责任。你可以问自己:“我是否曾捡起一些垃圾并把它们扔到垃圾箱里
- Keep the environment clean and tidy. Don't spit about or spit out chewing gum. Don't drop litter. Don't smoke except in designated areas. 维护环境卫生。不随地吐痰和口香糖,不乱扔废弃物,不在禁烟场所吸烟。
- The best way to solve pest and hygienic problems is to keep your environment clean and tidy to prevent infestation from the outside. 最有效解决昆虫及卫生问题的方法是保持环境整洁并防止昆虫从外进入，故除使用灭虫产品外，同时我们也建议客人尽量保持地方整洁。
- Road should be built with hard ground. Everyone should cultivate good sanitation habits so as to keep the environment clean. 实现道路硬底化，人人养成不随地抛弃垃圾、不随地便溺的习惯，保持室内、外环境清洁；
- Others put forth a counter proposal of keeping the environment clean, storing the food properly, setting traps, and releasing captured rats in the mountains. 另一方则建议应该将环境打扫乾净,食物储存好,并摆放捕鼠笼再送山里放生。
